Mitsubishi Grandis. Manual — part 989

SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-8

23

Instrument panel wiring harness

→

Junction block (fuse No.3)

Correct or replace the instrument
panel wiring harness.

24

Instrument panel wiring harness

→

Junction block (fuse No.2)

Correct or replace the instrument
panel wiring harness.

27, 28

Instrument panel wiring harness

→

Air bag module (Front passenger's
side) <1st squib side>

Correct or replace the instrument
panel wiring harness.

29

Instrument panel wiring harness

→

Passnger’s air bag cut off switch ON
terminal

Correct or replace the instrument
panel wiring harness.

30, 31

Instrument panel wiring harness

→

Air bag module (Front passenger's
side) <2nd squib side>

Correct or replace the instrument
panel wiring harness.

32

Instrument panel wiring harness

→

Can_H line

Correct or replace the can line.

33, 34

Instrument panel wiring harness

→

Clock spring

→ Air bag module

(Driver's side) <2nd squib side>

Correct or replace instrument panel
wiring harness. Replace the clock
spring.

35

Instrument panel wiring harness

→

Passnger’s air bag cut off switch
COM terminal

Correct or replace the instrument
panel wiring harness.

36, 37

Instrument panel wiring harness

→

Clock spring

→ Air bag module

(Driver's side) <1st squib side>

Correct or replace instrument panel
wiring harness. Replace the clock
spring.

38, 39

Front wiring harness

→ Instrument

panel wiring harness

→ Front impact

sensor (LH)

Correct or replace each wiring
harness.

40

Instrument panel wiring harness

→

Earth

Correct or replace the instrument
panel wiring harness.

41

Instrument panel wiring harness

→

Passnger’s air bag cut off switch
OFF terminal

Correct or replace the instrument
panel wiring harness.

43

Instrument panel wiring harness

→

Can_L line

Correct or replace the can line.

47, 48

Front wiring harness

→ Instrument

panel wiring harness

→ Front impact

sensor (RH)

Correct or replace each wiring
harness.

57, 58

Floor wiring harness

→ Side-airbag

module (RH)

Correct or replace the floor wiring
harness.

59, 60

Floor wiring harness

→ Seat belt

pre-tensioner (RH)

Correct or replace the floor wiring
harness.

SRS-ECU terminal No.

Destination of harness

Remedy

SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-9

DANGER

After disconnecting the battery cable, wait 60
seconds or more before proceeding with the
following work. In addition, insulate the
negative battery terminal with a tape. The
condenser inside the SRS-ECU is designed

to retain enough voltage to deploy the air
bag for a short time even after the battery

61, 62

Floor wiring harness

→ Curtain air

bag module (RH)

Correct or replace the floor wiring
harness.

63, 64

Floor wiring harness

→ Side impact

sensor (front) (RH)

Correct or replace the floor wiring
harness.

67, 68

Floor wiring harness

→ Side impact

sensor (rear) (RH)

Correct or replace the floor wiring
harness.

SRS-ECU terminal No.

Destination of harness

Remedy

AC300580AB

Insulating tape

Battery

Battery cable

SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-10

has been disconnected, so serious injury
may result from unintended air bag
deployment if work is done on the SRS
system immediately after the battery cables
are disconnected.

CAUTION

• The SRS components and seat belt with

pre-tensioner should not be subjected to
heat, so remove the SRS-ECU, driver’s and
passenger’s (front) air bag modules, clock
spring, side-airbag modules, and seat belt
pre-tensioner before drying or baking the
vehicle after painting.

• SRS-ECU, air bag modules, clock spring,

impact sensors: 93

°C or more

• Seat belt with pre-tensioner: 90°C or more

• Whenever you finish servicing the SRS,

always erase the diagnosis code and check
warning lamp operation to make sure that the
system functions properly.

•

If checks are carried out by using the SRS-ECU

harness connector, observe the following
procedures: Insert the special tool probe in
the harness set (MB991222) into connector
from harness side (rear side), and connect the
tester to this probe. If any tool than special
tool is used, damage to the harness and other
components will result. Never insert the
probe directly to the terminals from the front
of the connector. The terminals are plated to
increase their conductivity, so that if they are

touched directly by the probe, the plating may
break, which will cause drops in reliability.

AC311053

AC300928

63

55

51

69

61

66

58

65

64

56 57

68

60

67

59

70

62

53

52 B

A

54

A

B

18

10

15

7

13

5

14

6

16

8

17

9

19

11

20

12

1 2

3 4

42

31

38

27

21

41

28

39

22

30

25

47

36

33

44

34

45

37

48

26

29

23

40

32

43

35

46

24

B

A

AC

SRS-harness connector

SRS-ECU harness connector
(rear side)

MB991222

SPECIAL TOOLS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-11

SPECIAL TOOLS

M1524000700550

Tool

No.

Name

Application

MB990784

Ornament remover

Removal of cover.

MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

MUT-III sub-assembly
A: Vehicle
communication
interface (V. C. I.)
B: MUT-III USB cable
C: MUT-III main
harness A (applicable
to vehicles with CAN
communication)
D: MUT-III main
harness B (applicable
to vehicles without CAN
communication)
E: MUT-III
Measurement adapter
F: MUT-III Trigger
harness

Checking diagnosis code

CAUTION

MUT-III main harness B
(MB991911) should be used.
MUT-III main harness A should
not be used for this vehicle.

MB991865

Dummy resistor

SRS air bag and seat belt with
pre-tensioner circuit check

MB991866

Resistor harness

SRS air bag circuit check

MB990784

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USED

MB991865

MB991866